GPS mounting location Options

[GotToyota]

Hey guys, I'm wanting to buy a GPS system, I've wanted one for awhile, but my work is having some awesome GPS deals tomorrow for Black Friday, and I'm going to have my parents pick one up for me. The problem is that I don't want to use the windshield mount that they usually come with. I want to have it mounted somewhere in the vehicle and have it look flush. What have you guys done for this? Here is a pic of the places I was thinking of:


*Note, the holes are most likely smaller then the size of the GPS, but this is an idea of placements I was considering.

Any ideas/suggestions would be great. Power isn't an option since the GPS has a rechargeable battery.

-Matt